/*
 * Copyright (c) 2015, Nils Braden
 *
 * This file is part of ttrss-reader-fork. This program is free software; you
 * can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation;
 * either version 3 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details. You should have received a
 * copy of the GNU General Public License along with this program; If
 * not, see http://www.gnu.org/licenses/.
 */

package org.ttrssreader.model.updaters;

import org.ttrssreader.gui.interfaces.IUpdateEndListener;
import org.ttrssreader.utils.AsyncTask;
import org.ttrssreader.utils.WeakReferenceHandler;

import android.app.Activity;
import android.os.Message;

public class Updater extends AsyncTask<Void, Void, Void> {

    private IUpdatable updatable;

    public Updater(Activity parent, IUpdatable updatable) {
        this(parent, updatable, false);
    }

    public Updater(Activity parent, IUpdatable updatable, boolean goBackAfterUpdate) {
        this.updatable = updatable;
        if (parent instanceof IUpdateEndListener)
            this.handler = new MsgHandler((IUpdateEndListener) parent, goBackAfterUpdate);
    }

    // Use handler with weak reference on parent object
    private static class MsgHandler extends WeakReferenceHandler<IUpdateEndListener> {
        boolean goBackAfterUpdate;

        public MsgHandler(IUpdateEndListener parent, boolean goBackAfterUpdate) {
            super(parent);
            this.goBackAfterUpdate = goBackAfterUpdate;
        }

        @Override
        public void handleMessage(IUpdateEndListener parent, Message msg) {
            parent.onUpdateEnd(goBackAfterUpdate);
        }
    }

    private MsgHandler handler;

    @Override
    protected Void doInBackground(Void... params) {
        updatable.update(this);
        if (handler != null)
            handler.sendEmptyMessage(0);
        return null;
    }

}
